These are whelks processed into conch shells. Set of 8. They can be blown, and they make a sound, but it's a small one. They are capable of producing a sound. Regarding the production, they have been thoroughly cleaned, disinfected, and processed, but they are natural items. Please refrain from purchasing if you are sensitive or seeking perfection. Regarding transactions, no claims and no returns are accepted. They are also listed on other sites, so please understand that they will be discontinued once sold out. SPEC Blowing diameter: 11mm Length: Approximately 7~7.5cm Weight: Approximately 43~49g